If I don't want to delete a particular entry in my journal, I cut and paste the message and then delete that entry. Then, I will paste the information on a new entry with or without a new photo and resubmit it.

You can't just get rid of the picture unfortunately--you'll have to delete the whole entry. That's why podster suggested cutting & pasting the text into a new entry first, then you delete the old one with the picture.